#!/usr/bin/env python
# -*- coding:utf-8 -*-
import sys

sys.path.append('..')
from common_utils import CBBCommonUtils


def get_plugin_info():
    plugin_info = {
        "name": "centos_authentication_001 Cryptoperiod",
        "plugin_id": "centos_authentication_001",
        "plugin_type": "Authentication",
        "info": "Check and set the cryptoperiod",
        "level": "C",
        "module": "Safety reinforcement",
        "author": "fanyi",
        "keyword": "Safety reinforcement",
        "configable": "false",
    }
    return plugin_info


logger = None
cur_user = None
cur_module = None
cur_task = None


def set_plugin_logger(setter, user, module, task, *args, **kwargs):
    global logger, cur_user, cur_module, cur_task
    logger = setter
    cur_user = user
    cur_module = module
    cur_task = task


# 扫描函数
def scan(ip, sys_user, sys_pwd, flag=0):
    des_list = []
    error_count = 0
    Max_flag = -1
    Min_flag = -1
    Warn_flag = -1
    logger.debug_info(cur_user, cur_module, cur_task + '_Scan', '', "Scan Start.")
    # 获取密码超时天数
    cmd = "cat /etc/login.defs | grep -E \"PASS_MAX_DAYS|PASS_MIN_DAYS|PASS_WARN_AGE\" | grep -v \"#\""
    result, output = CBBCommonUtils.cbb_run_cmd(ip, cmd, username=sys_user, passwd=sys_pwd)
    # 检错，每次执行命令都会进行检错，并决定返回退出/继续执行
    if not result:
        for item in output:
            # 返回值格式化，去除不需要的内容/符号
            item = item.replace("\n", "")
            item = item.split()
            # 密码超时天数警告
            if item[0] == "PASS_MAX_DAYS" and int(item[1]) > 90:
                timout_des = "Max Timout is DANGEROUS. now is {}.".format(item[1])
                error_count += 1
                Max_flag = item[1]
                des_list.append(timout_des)
                logger.debug_warning(cur_user, cur_module, cur_task + '_Scan', '', timout_des)
            elif item[0] == "PASS_MAX_DAYS" and int(item[1]) <= 90:
                timout_des = "Max Timout is SAFE. now is {}.".format(item[1])
                des_list.append(timout_des)
                logger.debug_info(cur_user, cur_module, cur_task + '_Scan', '', timout_des)
            elif item[0] == "PASS_MIN_DAYS" and int(item[1]) < 6:
                timout_des = "Min Timout is DANGEROUS. now is {}.".format(item[1])
                error_count += 1
                Min_flag = item[1]
                des_list.append(timout_des)
                logger.debug_warning(cur_user, cur_module, cur_task + '_Scan', '', timout_des)
            elif item[0] == "PASS_MIN_DAYS" and int(item[1]) >= 6:
                timout_des = "Min Timout is SAFE. now is {}.".format(item[1])
                des_list.append(timout_des)
                logger.debug_info(cur_user, cur_module, cur_task + '_Scan', '', timout_des)
            elif item[0] == "PASS_WARN_AGE" and int(item[1]) < 30:
                timout_des = "Warning Duration is DANGEROUS. now is {}.".format(item[1])
                error_count += 1
                Warn_flag = item[1]
                des_list.append(timout_des)
                logger.debug_warning(cur_user, cur_module, cur_task + '_Scan', '', timout_des)
            elif item[0] == "PASS_WARN_AGE" and int(item[1]) >= 30:
                timout_des = "Warning Duration is SAFE. now is {}.".format(item[1])
                des_list.append(timout_des)
                logger.debug_info(cur_user, cur_module, cur_task + '_Scan', '', timout_des)
    else:
        error_des = "CMD process ERROR. Error info: {}".format(result[0].replace("\n", ""))
        des_list.append(error_des)
        error_count += 1
        logger.debug_error(cur_user, cur_module, cur_task + '_Scan', '', error_des)
        return des_list, error_count
    des_list.append("Scan Complete.")
    logger.debug_info(cur_user, cur_module, cur_task + '_Scan', '', "Scan Complete.")
    if error_count == 0:
        return des_list, error_count
    # 是否加固
    if flag == 1:
        reinforce_des, reinforce_err = reinforce(ip, sys_user, sys_pwd, Max_flag, Min_flag, Warn_flag)
        if reinforce_err == 0:
            error_count = 0
            des_list.extend(reinforce_des)
        else:
            error_count += 1
            des_list.extend(reinforce_des)
    return des_list, error_count


# 加固函数
def reinforce(ip, sys_user, sys_pwd, Max_flag, Min_flag, Warn_flag):
    des_list = []
    error_count = 0
    logger.debug_info(cur_user, cur_module, cur_task + '_Reinforce', '', "Reinforce Start.")
    # 检查是否存在可能被覆盖的备份文件
    check_cmd = "ls /etc | grep login.defs.PT.`date +%Y-%m-%d`"
    check_result, check_output = CBBCommonUtils.cbb_run_cmd(ip, check_cmd, username=sys_user, passwd=sys_pwd)
    if not check_result and len(check_output) != 0:
        result = []
    else:
        # 备份文件，文件名中的PT为PasswordTimeout缩写，为了针对功能点控制备份文件用，避免备份冲突
        cmd = "cp /etc/login.defs /etc/login.defs.PT.`date +%Y-%m-%d`"
        result, output = CBBCommonUtils.cbb_run_cmd(ip, cmd, username=sys_user, passwd=sys_pwd)
    if not result:
        # 检查是否备份成功
        check_cmd = "ls /etc | grep login.defs.PT.`date +%Y-%m-%d`"
        check_result, check_output = CBBCommonUtils.cbb_run_cmd(ip, check_cmd, username=sys_user, passwd=sys_pwd)
        if not check_result and len(check_output) != 0:
            logger.debug_info(cur_user, cur_module, cur_task + '_Reinforce', '', "Backup Succeed.")
        else:
            error_count += 1
            backup_check_des = "Backup check FAILED."
            des_list.append(backup_check_des)
            logger.debug_error(cur_user, cur_module, cur_task + '_Reinforce', '', backup_check_des)
            return des_list, error_count
    else:
        error_count += 1
        backup_des = "Backup FAILED."
        des_list.append(backup_des)
        logger.debug_error(cur_user, cur_module, cur_task + '_Reinforce', '', backup_des)
        return des_list, error_count
    if Max_flag != -1:
        # 组装命令
        safe_cmd = "sed -i '/PASS_MAX_DAYS\t" + Max_flag + "/cPASS_MAX_DAYS\t90' \"/etc/login.defs\""
        # 修改对应行的内容
        result, output = CBBCommonUtils.cbb_run_cmd(ip, safe_cmd, username=sys_user, passwd=sys_pwd)
        if not result:
            pass
        else:
            error_count += 1
            des = "R$einforce FAILED."
            des_list.append(des)
            logger.debug_error(cur_user, cur_module, cur_task + '_Reinforce', '', des)
            # 加固失败，回滚
            rollback_des, rollback_err = rollback(ip, sys_user, sys_pwd)
            if rollback_err == 0:
                des_list.extend(rollback_des)
            else:
                error_count += 1
                des_list.extend(rollback_des)
            return des_list, error_count
    if Min_flag != -1:
        # 组装命令
        safe_cmd = "sed -i '/PASS_MIN_DAYS\t" + Min_flag + "/cPASS_MIN_DAYS\t6' \"/etc/login.defs\""
        # 修改对应行的内容
        result, output = CBBCommonUtils.cbb_run_cmd(ip, safe_cmd, username=sys_user, passwd=sys_pwd)
        if not result:
            pass
        else:
            error_count += 1
            des = "Reinforce FAILED."
            des_list.append(des)
            logger.debug_error(cur_user, cur_module, cur_task + '_Reinforce', '', des)
            # 加固失败，回滚
            rollback_des, rollback_err = rollback(ip, sys_user, sys_pwd)
            if rollback_err == 0:
                des_list.extend(rollback_des)
            else:
                error_count += 1
                des_list.extend(rollback_des)
            return des_list, error_count
    if Warn_flag != -1:
        # 组装命令
        safe_cmd = "sed -i '/PASS_WARN_AGE\t" + Warn_flag + "/cPASS_WARN_AGE\t30' \"/etc/login.defs\""
        # 修改对应行的内容
        result, output = CBBCommonUtils.cbb_run_cmd(ip, safe_cmd, username=sys_user, passwd=sys_pwd)
        if not result:
            pass
        else:
            error_count += 1
            des = "Reinforce FAILED."
            des_list.append(des)
            logger.debug_error(cur_user, cur_module, cur_task + '_Reinforce', '', des)
            # 加固失败，回滚
            rollback_des, rollback_err = rollback(ip, sys_user, sys_pwd)
            if rollback_err == 0:
                des_list.extend(rollback_des)
            else:
                error_count += 1
                des_list.extend(rollback_des)
            return des_list, error_count
    # 最后一次检查
    Max_flag = 0
    Min_flag = 0
    Warn_flag = 0
    cmd = "cat /etc/login.defs | grep -E \"PASS_MAX_DAYS|PASS_MIN_DAYS|PASS_WARN_AGE\" | grep -v \"#\""
    result, output = CBBCommonUtils.cbb_run_cmd(ip, cmd, username=sys_user, passwd=sys_pwd)
    # 检错，每次执行命令都会进行检错，并决定返回退出/继续执行
    if not result:
        for item in output:
            # 返回值格式化，去除不需要的内容/符号
            item = item.replace("\n", "")
            item = item.split()
            # 密码超时天数警告
            if item[0] == "PASS_MAX_DAYS" and int(item[1]) > 90:
                Max_flag = 1
            elif item[0] == "PASS_MAX_DAYS" and int(item[1]) <= 90:
                pass
            elif item[0] == "PASS_MIN_DAYS" and int(item[1]) < 6:
                Min_flag = 1
            elif item[0] == "PASS_MIN_DAYS" and int(item[1]) >= 6:
                pass
            elif item[0] == "PASS_WARN_AGE" and int(item[1]) < 30:
                Warn_flag = 1
            elif item[0] == "PASS_WARN_AGE" and int(item[1]) >= 30:
                pass
    else:
        error_des = "CMD process ERROR. Error info: {}".format(result[0].replace("\n", ""))
        des_list.append(error_des)
        error_count += 1
        logger.debug_error(cur_user, cur_module, cur_task + '_Scan', '', error_des)
        return des_list, error_count
    if Max_flag == 1 or Min_flag == 1 or Warn_flag == 1:
        error_count += 1
        des_list.append("Reinforce Error")
        logger.debug_error(cur_user, cur_module, cur_task + '_Reinforce', '', "Reinforce Error.")
        # 加固不成功，回滚
        rollback_des, rollback_err = rollback(ip, sys_user, sys_pwd)
        if rollback_err == 0:
            des_list.extend(rollback_des)
        else:
            error_count += 1
            des_list.extend(rollback_des)
        return des_list, error_count
    des_list.append("Reinforce Complete.")
    logger.debug_info(cur_user, cur_module, cur_task + '_Reinforce', '', "Reinforce Complete.")
    return des_list, error_count


# 回滚函数
def rollback(ip, sys_user, sys_pwd):
    des_list = []
    error_count = 0
    logger.debug_info(cur_user, cur_module, cur_task + '_Rollback', '', "Rollback Start.")
    # 查找备份文件，此处的查找支持多备份文件的查找（结果会按时间顺序排序），并默认回滚最新一次备份的内容，可以连续多次回滚
    grep_cmd = "ls /etc/ | grep login.defs.PT.*"
    result, output = CBBCommonUtils.cbb_run_cmd(ip, grep_cmd, username=sys_user, passwd=sys_pwd)
    if not result and len(output) != 0:
        target = output[len(output) - 1].replace("\n", "")
        cmd = "/bin/cp -rf /etc/" + target + " /etc/login.defs"
    else:
        error_count = -1
        des_list.append("Backup file NOT FOUND.")
        logger.debug_error(cur_user, cur_module, cur_task + '_Rollback', '', "Backup file not found.")
        return des_list, error_count
    # 回滚文件，
    result, output = CBBCommonUtils.cbb_run_cmd(ip, cmd, username=sys_user, passwd=sys_pwd)
    if not result:
        del_cmd = "rm -rf /etc/" + target
        # 删除对应的备份文件
        result, output = CBBCommonUtils.cbb_run_cmd(ip, del_cmd, username=sys_user, passwd=sys_pwd)
        if not result:
            del_des = "Backup file deleted. Target is {}.".format(target)
            logger.debug_info(cur_user, cur_module, cur_task + '_Rollback', '', del_des)
        else:
            error_count += 1
            del_des = "Backup file delete FAILED."
            des_list.append(del_des)
            logger.debug_error(cur_user, cur_module, cur_task + '_Rollback', '', del_des)
            return des_list, error_count
    else:
        error_count += 1
        des = "Rollback FAILED, please retry."
        des_list.append(des)
        logger.debug_error(cur_user, cur_module, cur_task + '_Rollback', '', des)
        return des_list, error_count
    des_list.append("Rollback Complete.")
    logger.debug_info(cur_user, cur_module, cur_task + '_Rollback', '', "Rollback Complete.")
    return des_list, error_count


def check(ip, *args, **kwargs):
    sys_user = kwargs.get("system_user")
    sys_pwd = kwargs.get("system_pwd")
    comm = kwargs.get("command")
    try:
        des_list = []
        logger.debug_info(cur_user, cur_module, cur_task + '_Check', '', "centos_authentication_001 Start.")
        if comm == 1:
            des_scan, error_scan = scan(ip, sys_user, sys_pwd, flag=0)
            des_list.extend(des_scan)
            step_error = int(error_scan)
        elif comm == 2:
            des_reinforce, error_reinforce = scan(ip, sys_user, sys_pwd, flag=1)
            des_list.extend(des_reinforce)
            step_error = int(error_reinforce)
        elif comm == 3:
            des_rollback, error_rollback = rollback(ip, sys_user, sys_pwd)
            des_list.extend(des_rollback)
            step_error = int(error_rollback)
        else:
            return {"code": 3, "count": 0, "des": ['command must be 1/2/3']}
        logger.debug_info(cur_user, cur_module, cur_task + '_Check', '', "centos_authentication_001 Complete.")
        if step_error == 0:
            code = 0
        elif step_error <= -1:
            code = 2
        else:
            code = 1
        return {"code": code, "count": step_error, "des": des_list}
    except Exception as er:
        code = 1
        des = ["ERROR:", str(er)]
        logger.debug_error(cur_user, cur_module, cur_task + '_Check', '', des)
        return {"code": code, "count": 0, "des": des}
